How to Make a Closed Terrarium for Beginners

Let’s get started.

1. Wash and dry your jar. Choose small tropical plants that enjoy humidity; avoid cacti and succulents in a closed jar.
2. Add a shallow stone layer and a mesh separator, then enough potting mix to hold the roots. The lower layer is a reservoir, not a substitute for careful watering.
3. Gently loosen the roots and plant with a spoon. Leave room between plants and keep leaves away from the glass.
4. Add a little water so the soil is lightly moist, never soggy. Close the lid and place in bright, indirect light.
5. Observe over the next week. Brief morning condensation is normal; persistent heavy condensation or standing water means you should ventilate and reduce moisture.

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